спасибо, мужик, это действительно помогло мне.мне стыдно за эту глупую ошибку.Во всяком случае, теперь это работает довольно хорошо, поэтому я подумал, что не могу загрузить код, чтобы любой желающий мог его использовать.сейчас я могу загружать изображения GIF только по какой-то причине, поэтому, если у кого-то есть идеи, почему это поможет.
фиксированный код:
<html>
<head>
<title>Learning WebGL — lesson 5</title>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript" src="glMatrix-0.9.5.min.js"></script>
<script type="text/javascript" src="webgl-utils.js"></script>
<script id="shader-fs" type="x-shader/x-fragment">
#ifdef GL_ES
precision highp float;
#endif
varying vec2 vTextureCoord;
uniform sampler2D uSampler;
void main(void) {
gl_FragColor = texture2D(uSampler, vec2(vTextureCoord.s, vTextureCoord.t));
//gl_FragColor = vec4(1.0, 0.0, 1.0, 1.0);
}
</script>
<script id="shader-vs" type="x-shader/x-vertex">
attribute vec3 aVertexPosition;
attribute vec2 aTextureCoord;
uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;
varying vec2 vTextureCoord;
void main(void) {
gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
vTextureCoord = aTextureCoord;
}
</script>
<script type="text/javascript">
var gl;
var pics_num;
var pics_names=["nehe.gif","moon.gif","nehe.gif","nehe.gif","nehe.gif","nehe.gif","moon.gif","moon.gif"]
pics_num=pics_names.length;
function initGL(canvas) {
try {
gl = canvas.getContext("experimental-webgl");
gl.viewportWidth = canvas.width;
gl.viewportHeight = canvas.height;
} catch (e) {
}
if (!gl) {
alert("Could not initialise WebGL, sorry :-(");
}
}
function getShader(gl, id) {
var shaderScript = document.getElementById(id);
if (!shaderScript) {
return null;
}
var str = "";
var k = shaderScript.firstChild;
while (k) {
if (k.nodeType == 3) {
str += k.textContent;
}
k = k.nextSibling;
}
var shader;
if (shaderScript.type == "x-shader/x-fragment") {
shader = gl.createShader(gl.FRAGMENT_SHADER);
} else if (shaderScript.type == "x-shader/x-vertex") {
shader = gl.createShader(gl.VERTEX_SHADER);
} else {
return null;
}
gl.shaderSource(shader, str);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
alert(gl.getShaderInfoLog(shader));
return null;
}
return shader;
}
var shaderProgram;
function initShaders() {
var fragmentShader = getShader(gl, "shader-fs");
var vertexShader = getShader(gl, "shader-vs");
shaderProgram = gl.createProgram();
gl.attachShader(shaderProgram, vertexShader);
gl.attachShader(shaderProgram, fragmentShader);
gl.linkProgram(shaderProgram);
if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
alert("Could not initialise shaders");
}
gl.useProgram(shaderProgram);
shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);
shaderProgram.textureCoordAttribute = gl.getAttribLocation(shaderProgram, "aTextureCoord");
gl.enableVertexAttribArray(shaderProgram.textureCoordAttribute);
shaderProgram.pMatrixUniform = gl.getUniformLocation(shaderProgram, "uPMatrix");
shaderProgram.mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
shaderProgram.samplerUniform = gl.getUniformLocation(shaderProgram, "uSampler");
}
function handleLoadedTexture(texture) {
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, texture.image);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.bindTexture(gl.TEXTURE_2D, null);
}
function loadTexture(image) {
var texture=gl.createTexture();
texture.image=new Image()
texture.image.onload = function () {
handleLoadedTexture(texture);
//drawScene();
}
texture.image.src = image;
return texture;
}
//var neheTexture;
var Texture_array=new Array();
function initTexture() {
for (var i=0;i<pics_num;i=i+1)
{
//Texture_array[i] = gl.createTexture();
//Texture_array[i].image = new Image();
//Texture_array[i].image.onload = function () {
// handleLoadedTexture(Texture_array[i])
//}
//Texture_array[i].image.src = pics_names[i];
Texture_array[i]=loadTexture(pics_names[i]);
}
//gl.clearColor(0.0, 0.0, 0.0, 1.0);
//gl.enable(gl.DEPTH_TEST);
//drawScene();
}
var mvMatrix = mat4.create();
var mvMatrixStack = [];
var pMatrix = mat4.create();
function mvPushMatrix() {
var copy = mat4.create();
mat4.set(mvMatrix, copy);
mvMatrixStack.push(copy);
}
function mvPopMatrix() {
if (mvMatrixStack.length == 0) {
throw "Invalid popMatrix!";
}
mvMatrix = mvMatrixStack.pop();
}
function setMatrixUniforms() {
gl.uniformMatrix4fv(shaderProgram.pMatrixUniform, false, pMatrix);
gl.uniformMatrix4fv(shaderProgram.mvMatrixUniform, false, mvMatrix);
}
function degToRad(degrees) {
return degrees * Math.PI / 180;
}
var VertexPositionBuffer=new Array();
var VertexTextureCoordBuffer=new Array();
var VertexIndexBuffer=new Array();
function initBuffers() {
for (var i=0;i<pics_num;i=i+1)
{
VertexPositionBuffer[i] = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, VertexPositionBuffer[i]);
vertices = [
Math.cos(i*((2*Math.PI)/pics_num)), -0.5, Math.sin(i*((2*Math.PI)/pics_num)),
Math.cos(i*((2*Math.PI)/pics_num)), 0.5, Math.sin(i*((2*Math.PI)/pics_num)),
Math.cos((i+1)*((2*Math.PI)/pics_num)), 0.5, Math.sin((i+1)*((2*Math.PI)/pics_num)),
Math.cos((i+1)*((2*Math.PI)/pics_num)), -0.5, Math.sin((i+1)*((2*Math.PI)/pics_num)),
];
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);
VertexPositionBuffer[i].itemSize = 3;
VertexPositionBuffer[i].numItems = 4;
VertexTextureCoordBuffer[i] = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, VertexTextureCoordBuffer[i] );
var textureCoords = [
0.0, 0.0,
1.0, 0.0,
1.0, 1.0,
0.0, 1.0,
];
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(textureCoords), gl.STATIC_DRAW);
VertexTextureCoordBuffer[i].itemSize = 2;
VertexTextureCoordBuffer[i].numItems = 4;
VertexIndexBuffer[i] = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, VertexIndexBuffer[i]);
var cubeVertexIndices = [
0, 1, 2, 0, 2, 3,
];
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(cubeVertexIndices), gl.STATIC_DRAW);
VertexIndexBuffer[i].itemSize = 1;
VertexIndexBuffer[i].numItems = 6;
}
}
var mouseDown = false;
var lastMouseX = null;
var lastMouseY = null;
var RotationMatrix = mat4.create();
mat4.identity(RotationMatrix);
function handleMouseDown(event) {
mouseDown = true;
lastMouseX = event.clientX;
lastMouseY = event.clientY;
}
function handleMouseUp(event) {
mouseDown = false;
}
function handleMouseMove(event) {
if (!mouseDown) {
return;
}
var newX = event.clientX;
var newY = event.clientY;
var deltaX = newX - lastMouseX;
var newRotationMatrix = mat4.create();
mat4.identity(newRotationMatrix);
mat4.rotate(newRotationMatrix, degToRad(deltaX / 5), [0, 1, 0]);
var deltaY = newY - lastMouseY;
mat4.rotate(newRotationMatrix, degToRad(deltaY / 5), [1, 0, 0]);
mat4.multiply(newRotationMatrix, RotationMatrix, RotationMatrix);
lastMouseX = newX
lastMouseY = newY;
}
var MoveMatrix = mat4.create();
mat4.identity(MoveMatrix);
function handleMouseWheel(event) {
mat4.translate(MoveMatrix, [0.0, 0.0, event.wheelDelta/120]);
}
function drawScene() {
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
mat4.perspective(30, gl.viewportWidth / gl.viewportHeight, 0.1, 100.0, pMatrix);
mat4.identity(mvMatrix);
mat4.translate(mvMatrix, [0.0, 0.0, -5.0]);
mat4.multiply(mvMatrix, MoveMatrix);
mat4.multiply(mvMatrix, RotationMatrix);
for (var i=0;i<pics_num;i=i+1)
{
//mvPushMatrix();
gl.bindBuffer(gl.ARRAY_BUFFER, VertexPositionBuffer[i]);
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, VertexPositionBuffer[i].itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, VertexTextureCoordBuffer[i]);
gl.vertexAttribPointer(shaderProgram.textureCoordAttribute, VertexTextureCoordBuffer[i].itemSize, gl.FLOAT, false, 0, 0);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, Texture_array[i]);
gl.uniform1i(shaderProgram.samplerUniform, 0);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, VertexIndexBuffer[i]);
setMatrixUniforms();
gl.drawElements(gl.TRIANGLES, VertexIndexBuffer[i].numItems, gl.UNSIGNED_SHORT, 0);
//mvPopMatrix();
}
}
function tick() {
requestAnimFrame(tick);
drawScene();
}
function webGLStart() {
var canvas = document.getElementById("lesson05-canvas");
initGL(canvas);
initShaders();
initBuffers();
initTexture();
gl.clearColor(0.0, 0.0, 0.0, 1.0);
gl.enable(gl.DEPTH_TEST);
canvas.onmousedown = handleMouseDown;
document.onmouseup = handleMouseUp;
document.onmousemove = handleMouseMove;
document.onmousewheel = handleMouseWheel;
tick();
}
</script>
</head>
<body onload="webGLStart();">
<a href="http://learningwebgl.com/blog/?p=507"><< Back to Lesson 5</a><br />
<canvas id="lesson05-canvas" style="border: none;" width="500" height="500"></canvas>
<br/>
<a href="http://learningwebgl.com/blog/?p=507"><< Back to Lesson 5</a><br />
</body>
</html>
все, что вам нужно сделать, это загрузитьglMatrix-0.9.5.min.js, webgl-utils.js и измените имена картинок в массиве pics_names в строке 46.